A dog toy has a cavity for holding a dog treat or another toy and is in the form of a ball and is edible. Several apertures allow a dog to see and smell the contents of the inner cavity and provide motivation for the dog to try to get at the cavity's contents. The upper and lower halves are screwed or snapped together, enabling the dog toy to be opened by a human in order to place a toy or treat in the inner cavity. The dog toy is made with a formula that results in it being sufficiently hard and durable that it will take time and effort for a dog to break through to get at the contents. The toy will therefore help clean the dog's teeth and gums as the dog chews at it.